Copper has only two naturally occurring isotopes, Cu-63 and Cu-65. The mass of Cu- 63 is 62.9396 amu and the mass of Cu-65 is 64.9278 amu. Use the atomic mass of copper to determine the relative abundance of each isotope in a naturally occurring sample. Express your answers numerically separated by a comma.

Clouds form when water vapor to form small droplets. a. humidifies b. condenses c. evaporates d. precipitates

Look at the reaction below: ca(hco3)2 --> caco3 + co2 + h2o first, balance the reaction. once balanced, use dimensional analysis or another method to find out how many moles of carbon dioxide will be produced if we start with 16.5 moles of calcium bicarbonate (calcium hydrogen carbonate). = mol of co2 number needs to be reported to three significant figures.

What’s the percent by mass of carbon in c10h14n2